california banned banned the use 10 years ago. it has been banned from farm use in 160 countries. groups and lawmakers stepped up their calls to pull the chemical from pharmacy shelves. arguing if it is not safe on farms it is not safe on children's heads. >> it could cause headaches, nausea, there could be seizures and deaths. >> the manufacturer says the chemical has been used for 50 years and is safe and well tolerated. >>> how this material can bring a happy ending to 7 minutes of terror. i will explain. >> back here in 10 minutes, lots of fog, there is more fog in the forecast, and it will have a big impact on that five- day forecast. back here in 10 minutes. >>> nasa previewed an attempt to unravel the secrets of mars. ktvu's john fowler is here now with more. >> reporter: the space craft, half of mars missions survive landings. this robot, the size of a -- well, move this, the size of a compact car. the size of a compact car. it will keep the scientists waiting 7 minutes to know if their mars curiosity rover survived the trip to mars. >> reporter: it takes so long for radio